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The Enterprise, White Salmon, WA., May 13, 1921, page 1

BIG SLIDE OF MUD ON SOUTH SLOPE OF MT. ADAMS
Said To have Been Caused by Hot Vapors From Crevice 2500 Feet From Top of Snow Peak

The gigantic spectacle occurring on the south slope of Mt. Adams Sunday morning, presenting a sight new to residents who have lived in the Trout Lake valley for more than 30 years, was Monday found to have been caused by mud, said Dr. A.G. Belsheim, of Guler, while in town Wednesday. The tremendous avalanche, plainly discernable from various sections of the White Salmon valley, was noticed by many people. J.E. Wang, of Trout Lake, who has guided many parties to the top of Mt. Adams, who is familiar with every part of the mountain, says that two years ago he encountered hot vapors issuing from a large crevice at the point where the slide began last Sunday, which indicates volcanic action. The slide of mud started about 2500 feet from the top of the mountain covering a mile in width at its starting point and widening out to three miles for a distance of five miles.

The Enterprise, White Salmon, WA., September 2, 1921, page 1

MT. ADAMS' SLIDE NOT "MUD FLOW" SAY GEOLOGISTS

About twelve University of Chicago geology students are camped at the Stevenson auto park and are at Red Bluff today studying the formations around the cliffs and in the canyons. Their investigations will be to determine the cause of the shifting and slides of rocks at the bluffs. The party spent two days on Mt. Adams and their views' was that the big slide on the south side of the mountain was caused by an avalanche. "The "slide" is not a mud flow," said one of the party, "nor is it an eruption of any sort. It is merely an avalanche of larger proportions than usual, consisting mainly of snow and ice, with a good deal of mud and rock debris. The avalanche originated in the rock at the head of a glacier, going thru a notch in the narrow divide between and down the path of Avalanche glacier to a point well below the timber line. The glacier is muddied and dirtied, and the trees at the lower end are broken and covered with debris. The total length of the avalanche is perhaps five miles. "The disturbances occurred, according to the foresters, some time in February and was apparently caused by slipping at the head of the glacier." From Stevenson Pioneer.